1. Your understanding determines your ability to know what time it is. 
And of the children of Issachar, which were men that had understanding of the times, to know what Israel ought to do; the heads of them were two hundred; and all their brethren were at their commandment.  1 Chronicles 12:32

2. Your understanding determines your ability to get a husband.

Abigail was able to have two husbands in quick succession.  Most women are fortunate to have one husband.  Abigail had two husbands because she was a woman of good understanding.
Now the name of the man was Nabal; and the name of his wife Abigail: and she was A WOMAN OF GOOD UNDERSTANDING, and of a beautiful countenance: but the man was churlish and evil in his doings; and he was of the house of Caleb.   1 Samuel 25:3

3. Your understanding determines whether you will be shown mercy or not. 

The man of understanding has made himself capable of receiving mercy and favour; understanding determines the favour you receive from men, whether people choose you or not.
When the boughs thereof are withered, they shall be broken off: the women come, and set them on fire: FOR IT IS A PEOPLE OF NO UNDERSTANDING: THEREFORE HE THAT MADE THEM WILL NOT HAVE MERCY ON THEM, and he that formed them will shew them no favour.  Isaiah 27:11

4. Your understanding determines your ability to fulfil your calling.   
The EYES OF YOUR UNDERSTANDING BEING ENLIGHTENED; THAT YE MAY KNOW WHAT IS THE HOPE OF HIS CALLING, and what the riches of the glory of his inheritance in the saints, Ephesians 1:18

5. Your understanding determines your ability to keep poverty away.

A good understanding is a master key to your protection against the invasion of poverty.
I went by the field of the slothful, and by THE VINEYARD OF THE MAN VOID OF UNDERSTANDING; and, lo, it was all grown over with thorns, and nettles had covered the face thereof, and the stone wall thereof was broken down. Then I saw, and considered it well: I looked upon it, and received instruction. Yet a little sleep, a little slumber, a little folding of the hands to sleep: So shall thy poverty come as one that travelleth; and thy want as an armed man.
Proverbs 24:30-34

6. Your understanding determines your ability to lead. 

It is the master key to good leadership.  Bad leadership is characterized by oppression. 
THE PRINCE THAT WANTETH UNDERSTANDING IS ALSO A GREAT OPPRESSOR: but he that hateth covetousness shall prolong his days. Proverbs 28:16

7. Your understanding determines how self-controlled you are.
HE THAT IS SLOW TO WRATH IS OF GREAT UNDERSTANDING: but he that is hasty of spirit exalteth folly. Proverbs 14:29

8. Your understanding determines your ability to keep away from wrong relationships with women.
And beheld among the simple ones, I discerned among the youths, A YOUNG MAN VOID OF UNDERSTANDING, PASSING THROUGH THE STREET NEAR HER CORNER; and he went the way to her house, In the twilight, in the evening, in the black and dark night: And, behold, there met him a woman with the attire of an harlot, and subtil of heart.  Proverbs 7:7-10

9. Your understanding determines your ability to receive advice when it is given. 

Never advise a person who lacks understanding.
A wise man will hear, and will increase learning; AND A MAN OF UNDERSTANDING SHALL ATTAIN UNTO WISE COUNSELS: Proverbs 1:5

10. Your understanding determines whether you will “be exalted and promoted. 
For thou hast hid their heart from understanding: therefore shalt thou not exalt them. Job 17:4

11. Your understanding determines whether you can have a teaching ministry or not. 
And such as do wickedly against the covenant shall he corrupt by flatteries: but the people that do know their God shall be strong, and do exploits.  AND THEY THAT UNDERSTAND AMONG THE PEOPLE SHALL INSTRUCT MANY: yet they shall fall by the sword, and by flame, by captivity, and by spoil, many days.
Daniel 11:32-33

12. Understanding determines how we shall relate with you.  People who lack understanding must be controlled with brute force. A person who lacks understanding must be treated like an animal.
Be ye not as the horse, or as the mule, which have no understanding: whose mouth must be held in with bit and bridle, lest they come near unto thee.
Psalms 32:9”